Third Sigil of Baltur

Found by the party in a basilisk lair and used by Marnab. Farley is quite certain this item was made in Baltur.

This ancient looking amulet is made of three small interlocking discs made of a metal that is not quite bronze or brass but some other metal unknown to you. There are cutaways in the metal at two points where two discs meet.

When held, the item shares its name and properties. It requires the solving of a riddle before letting anyone attune to it.

Riddle: I have a head and a tail but no body. What am I?

As long as you own the Third Sigil of Baltur and are attuned to it, it has the following properties.

Instantaneous Barrier You can cast a Shield spell on yourself as a Reaction. Once used, this property can’t be used again until after a Long Rest.

Hurry Shortly On your turn, you can take the Dash action as a Bonus Action. You can use this property a number of times equal to your Proficiency Bonus and then this property can’t be used again until after a Short Rest.

Negligible Conduction When you cast a damage-dealing spell using this item as your spellcasting focus, you do 1 extra point of damage if the damage type of the spell is Lightning or Thunder.

At some point the item acquired a quirk:

That Languor After using the Instantaneous Barrier or Hurry Shortly property roll 1d4. If the result is a 1, your Speed is halved on your next turn.